The volume of natural gas is greatly reduced after liquefaction, and its volume is about 1/600 of the volume of the same amount of gaseous natural gas, which is convenient for transportation, especially in places without gas pipelines, by establishing gasification stations, natural gas can also be used. my country imports a large amount of liquefied natural gas from overseas every year, and uses liquefied natural gas to transport ships.
The world's advanced environmental protection countries are promoting the use of LNG. In addition to being used as fuel for power plants, factories, and household users, the methane contained in it can be used to manufacture fertilizers, methanol solvents, and synthetic acetic acid and other chemical raw materials; Ethane and propane can be cracked to produce ethylene and propylene, which are important raw materials for plastic products.
In addition, the ultra-low temperature LNG can provide a large amount of cold energy in the process of transforming into a normal temperature gaseous state under atmospheric pressure. The cold energy can be recovered and used in six low-temperature applications: separation of air to produce liquid oxygen and liquid nitrogen. , liquefied carbon dioxide, dry ice production, use of cold energy for power generation, production of frozen food or used in frozen warehouses, low temperature crushing treatment of industrial wastes such as rubber, plastic, iron filings, seawater desalination.
